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United States Patent | 5,036,881 |
Southmayd | August 6, 1991 |
A system for relieving excess ground water pressure surrounding a swimming pool is disclosed. A one-way flow valve is inserted in the pool enclosure so as to complete a passageway connecting its opposite sides. The valve comprises an elongated plunger slidingly engaged within a sleeve forming a portion of the passageway. The plunger has a tapered conical seating surface radially diagonal to its long axis. The sleeve contains a compatible conical surface such that when the two surfaces meet by sliding engagement of the plunger, the flow of water through the passageway into the pool is closed.
Inventors: | Southmayd; George C. (148 Westport Rd., Wilton, CT 06897) |
Appl. No.: | 430197 |
Filed: | November 1, 1989 |
Current U.S. Class: | 137/533.29 |
Intern'l Class: | F16K 017/12 |
Field of Search: | 137/516.27,516.29,533.21,533.29,533 |
1539617 | May., 1925 | Williston | 137/516. |
1825443 | Sep., 1931 | Chormann | 137/533. |
4276163 | Jun., 1981 | Gordon | 137/544. |
4860995 | Aug., 1989 | Rogers | 137/516. |